Offline 600W Battery Charger:

PFC + LLC with HR1211


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EVHR1211-Y-00B is an evaluation board for Lithium-ion chargers, which are typically used in e-mobility and Uninterruptible Power Supplies applications. It can also be used as a general power supply unit. The device will regulate the output voltage to 58.8 V in case of no battery attached. This solution is based on a PFC-LLC combo controlled from a single integrated circuit (HR1211).

Instead of using expensive low-frequency filters EVHR1211-Y-00B offers excellent power factor levels with active PFC (Power Factor Corrector). Also, the design shows high power density with low overall cost. In place of diodes, synchronous rectification (SR) decreases the voltage drop, and constant current constant voltage (CC-CV) control ensures the battery is charged properly.

Lithium-ion batteries generally require a Battery Management System (BMS) to ensure the battery operates within safe parameters. This charger can interact with a BMS through a relay signal. This helps prevent high-current spikes in the output connection, which can trigger the BMS protections.

Electromagnetic compatibility (EMC) conductive, harmonic emission and no-load consumption tests are done to ensure this device meets industry standards.


  • Wide 85V to 265V Operating Input Range
  • 14S battery configuration (3.6V)
  • High Efficiency, Up to 92%
  • Meets EuP Lot 6 and COC Version 5 Tier 2 Specifications
  • Meets Class A IEC61000-3-2 Standards
  • Meets EN55032 Class B Standards
  • High Power Factor (PF)
  • Overload Protection (Auto-Restart Mode)
  • Short-Circuit Protection (SCP) (Auto-Restart Mode)
  • Over-Voltage Protection (OVP)
  • Anti-Capacitive Mode Protection
  • Form Factor: 190 x 100 x 50 mm (3U rack STD)
600w battery charger


  • e-Bike Battery Chargers
  • Rack Uninterruptible Power Supplies

Block Diagram

Related Solutions

MPS Integrated Circuit Description
HR1211 High-performance digital PFC + LLC combo controller
HF500-15 Fixed frequency Flyback regulator
MP6925A Synchronous Rectifier (SR) controller
MP2009 Low Drop Out (LDO) voltage regulator

System Specifications

Parameter Specification
Input voltage range 85VAC to 265VAC
Output voltage range 35V to 58.8V ±1.5% DC
Output current 10A ±1.5%
Normal conditions Input: 230/120 Vac; Output: 50.4 Vdc 10A (14S Li-Ion STD)
Board form factor 190mm x 74mm x 50mm (3U rack STD)
Efficiency >92%
Standby power consumption Meets EuP Lot 4 and COC Version 5 Tier 2 (<500mW at 265V)
Conducted emissions EN55032 Class B Standard
Output voltage ripple ±100mV at full load
Output current ripple ±485mA at full load

Test Overview

Efficiency vs. load

Efficiency Vs. Load

power factor

Power Factor

current harmonic

Current Harmonic Distribution

efficiency vs vin

Efficiency Vs. VIN

output characteristics

Output Characteristic